The Hyperice Normatec 3 Massage System Lower Legs Attachment uses dynamic air compression to provide a restorative massage after workouts. It features 7 adjustable pressure levels to target post-workout leg aches and pains. Each attachment includes 3 overlapping zones for precise treatment across the entire leg. Connect to the Hyperice app via Bluetooth to download pre-programmed treatments and enhance recovery. The compact control unit is user-friendly, allowing for immediate use. Battery life is up to 3 hours. Dimensions are H:34.0 x W:25.0 x D:11.0 cm. This product is TSA Approved and comes with a 2-year guarantee. Batteries are required. Self-assembly is not necessary.